The Purpose of the present study is to present a case of alveolar rhabdomyosarcoma in an 81-year-old patient. An 81-year-old woman presents changes in bowel habits, as well as a mobile mass in the abdomen, fixed to deep planes. Resection is performed. Immunohistochemistry was positive to Myo D1, Anti CD99 and Synaptophysin. Rhabdomyosarcoma may be present in adults, for which it should be discarded in case of small round blue cell tumors. Immunohistochemistry is useful to make a differential diagnosis of the tumor. Survival rates rises when using chemotherapy and surgery.